Revert "feat(Page): teach Page.setContent to wait for resources to load (#1152)" (#1312)

This reverts commit 80ee469429.

Lifecycle events are not ready yet to support the setContent scenario.
The prerequisite for this is
https://chromium-review.googlesource.com/c/chromium/src/+/747805 that
might not land soon due to technical concerns.

lib/Page.js

@@ -438,17 +438,13 @@ class Page extends EventEmitter {
 
   /**
    * @param {string} html
-   * @param {!Object=} options
    */
-  async setContent(html, options) {
-    await Promise.all([
-      this.evaluate(html => {
-        document.open();
-        document.write(html);
-        document.close();
-      }, html),
-      this.waitForNavigation(options),
-    ]);
+  async setContent(html) {
+    await this.evaluate(html => {
+      document.open();
+      document.write(html);
+      document.close();
+    }, html);
   }
 
   /**